Dyno Run
1990 928 S4

March 7, 2008

I took the car to Tom's Dyno yesterday. Bill met us there and helped with
the set up and video. Here are a few photos:

1 Tom with my car on the dyno


2 Bill setting up the fans


3 View of the driver's side


4 Laptop with LM-1 and LMA-3 connected


We did several runs, adjusted the fuel pressure a few times and tightened the
supercharger belt to get the boost up. We saw boost levels from 12-14.5 psi,
and rwhp from 490-531.6. The dynapack seems to show about 5% less rwph
then the dynojet, so the numbers here are a little lower then what would be
expected.

Here's the results of the last two runs of the day, with the best run showing
531.6 SAE hp, and 504.6 ft-lbs torque.



Here is a 11.6 mb video, about 2 hours condensed into 3 1/2 minutes:
http://928.jorj7.com/dyno/Jorj7S4-DynoRun.wmv

Thanks to Tom and Bill for spending the time gettng this done. There's still some
tuning to do, especially in the mid-range, but the car should be ready for this season.

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Copyright 2008, George A Suennen
written: 03/13/08
rev: 03/13/08